package com.sun;


import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
import java.security.Key;

import java.util.Base64;
import java.util.Base64.Encoder;
import java.util.Base64.Decoder;

public class ThreeDESCBC {
    /**
     * @param key  密钥
     * @param data 明文
     * @return Base64编码的密文
     * @throws Exception
     * @Description ECB加密，不要IV
     */
    public static byte[] des3EncodeECB(byte[] key, byte[] data) throws Exception {
        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, deskey);
        byte[] bOut = cipher.doFinal(data);
        return bOut;
    }

    /**
     * @param key  密钥
     * @param data Base64编码的密文
     * @return 明文
     * @throws Exception
     * @Description ECB解密，不要IV
     */
    public static byte[] ees3DecodeECB(byte[] key, byte[] data) throws Exception {
        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede" + "/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, deskey);
        byte[] bOut = cipher.doFinal(data);
        return bOut;
    }

    /**
     * @param key   密钥
     * @param keyiv IV
     * @param data  明文
     * @return Base64编码的密文
     * @throws Exception
     * @Description CBC加密
     */
    public static byte[] des3EncodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {
        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(keyiv);
        cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
        byte[] bOut = cipher.doFinal(data);
        return bOut;
    }

    /**
     * @param key   密钥
     * @param keyiv IV
     * @param data  Base64编码的密文
     * @return 明文
     * @throws Exception
     * @Description CBC解密
     */
    public static byte[] des3DecodeCBC(byte[] key, byte[] keyiv, byte[] data) throws Exception {
        Key deskey = null;
        DESedeKeySpec spec = new DESedeKeySpec(key);
        SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
        deskey = keyfactory.generateSecret(spec);
        Cipher cipher = Cipher.getInstance("desede" + "/CBC/PKCS5Padding");
        IvParameterSpec ips = new IvParameterSpec(keyiv);
        cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
        byte[] bOut = cipher.doFinal(data);
        return bOut;
    }

    /**
     * @param args
     * @throws Exception
     * @Description 调试方法
     */
    public static void main(String[] args) throws Exception {
        Decoder decoder =  Base64.getDecoder();
        byte[] key = decoder.decode("YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4");
        byte[] keyiv = {1, 2, 3, 4, 5, 6, 7, 8};
        byte[] data = "420106198203279258".getBytes("UTF-8");
        System.out.println("ECB加密解密");
        byte[] str3 = des3EncodeECB(key, data);
        byte[] str4 = ees3DecodeECB(key, str3);
        System.out.println(Base64.getEncoder().encodeToString(str3));
        System.out.println(new String(str4, "UTF-8"));
        System.out.println();

        byte[] key1 = decoder.decode("1111111111111111");
        byte[] keyiv1 = decoder.decode("1111111111111111");
        byte[] data1 = "talent".getBytes("UTF-8");
        System.out.println("CBC加密解密");
        byte[] str5 = des3EncodeCBC(key1, keyiv1, data1);
        byte[] str6 = des3DecodeCBC(key1, keyiv1, str5);
        System.out.println(Base64.getEncoder().encodeToString(str5));
        System.out.println(new String(str6, "UTF-8"));

        String str7 = "uHrew7Thp2taL2NJpSJhF2mdFMP7BZ1W";
        byte[] str8 = Base64.getDecoder().decode(str7);
        byte[] str9 = des3DecodeCBC(key, keyiv, str8);
        System.out.println(new String(str9, "UTF-8"));
    }

}